[TASK] Streamline ElementInformationController

Basic refactoring of ElementInformationController (the
"info" modal on records). The entry method is more
clean, the class uses a bit less state, new backend
templating strategy is used. The controller is still
a bit messy and could be further cleaned up with an
additional patch that should further separate 'db',
'file' and 'folder' handling.

Resolves: #96767
Related: #96730
Releases: main
Change-Id: Ic8c27b6da5e4faf863d1ec70d060ec9fe86d357c
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/73330


Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Benni Mack <benni@typo3.org>